BoilerBuying Guide2026-02-24
Weather Compensation Explained
Weather compensation adjusts boiler output to outdoor temperature, saving 10–15%.
Weather compensation is a simple feature that makes a modulating boiler noticeably more efficient.
How it works
An outdoor sensor lets the boiler lower its flow temperature in milder weather, running longer and cooler instead of cycling hot.
The benefit
Running at lower temperatures keeps a condensing boiler in its most efficient range, cutting gas use by roughly 10–15%.
Key takeaways
- Adjusts output to outdoor temp
- Keeps the boiler condensing
- Saves roughly 10–15%
- Built into many premium combis
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